86 static inline bool subpool_is_free(struct hugepage_subpool *spool)  in subpool_is_free()  argument
88 	if (spool->count)  in subpool_is_free()
90 	if (spool->max_hpages != -1)  in subpool_is_free()
91 		return spool->used_hpages == 0;  in subpool_is_free()
92 	if (spool->min_hpages != -1)  in subpool_is_free()
93 		return spool->rsv_hpages == spool->min_hpages;  in subpool_is_free()
98 static inline void unlock_or_release_subpool(struct hugepage_subpool *spool,  in unlock_or_release_subpool()  argument
101 	spin_unlock_irqrestore(&spool->lock, irq_flags);  in unlock_or_release_subpool()
106 	if (subpool_is_free(spool)) {  in unlock_or_release_subpool()
107 		if (spool->min_hpages != -1)  in unlock_or_release_subpool()
108 			hugetlb_acct_memory(spool->hstate,  in unlock_or_release_subpool()
109 						-spool->min_hpages);  in unlock_or_release_subpool()
110 		kfree(spool);  in unlock_or_release_subpool()
117 	struct hugepage_subpool *spool;  in hugepage_new_subpool()  local
119 	spool = kzalloc(sizeof(*spool), GFP_KERNEL);  in hugepage_new_subpool()
120 	if (!spool)  in hugepage_new_subpool()
123 	spin_lock_init(&spool->lock);  in hugepage_new_subpool()
124 	spool->count = 1;  in hugepage_new_subpool()
125 	spool->max_hpages = max_hpages;  in hugepage_new_subpool()
126 	spool->hstate = h;  in hugepage_new_subpool()
127 	spool->min_hpages = min_hpages;  in hugepage_new_subpool()
130 		kfree(spool);  in hugepage_new_subpool()
133 	spool->rsv_hpages = min_hpages;  in hugepage_new_subpool()
135 	return spool;  in hugepage_new_subpool()
138 void hugepage_put_subpool(struct hugepage_subpool *spool)  in hugepage_put_subpool()  argument
142 	spin_lock_irqsave(&spool->lock, flags);  in hugepage_put_subpool()
143 	BUG_ON(!spool->count);  in hugepage_put_subpool()
144 	spool->count--;  in hugepage_put_subpool()
145 	unlock_or_release_subpool(spool, flags);  in hugepage_put_subpool()
156 static long hugepage_subpool_get_pages(struct hugepage_subpool *spool,  in hugepage_subpool_get_pages()  argument
161 	if (!spool)  in hugepage_subpool_get_pages()
164 	spin_lock_irq(&spool->lock);  in hugepage_subpool_get_pages()
166 	if (spool->max_hpages != -1) {		/* maximum size accounting */  in hugepage_subpool_get_pages()
167 		if ((spool->used_hpages + delta) <= spool->max_hpages)  in hugepage_subpool_get_pages()
168 			spool->used_hpages += delta;  in hugepage_subpool_get_pages()
176 	if (spool->min_hpages != -1 && spool->rsv_hpages) {  in hugepage_subpool_get_pages()
177 		if (delta > spool->rsv_hpages) {  in hugepage_subpool_get_pages()
182 			ret = delta - spool->rsv_hpages;  in hugepage_subpool_get_pages()
183 			spool->rsv_hpages = 0;  in hugepage_subpool_get_pages()
186 			spool->rsv_hpages -= delta;  in hugepage_subpool_get_pages()
191 	spin_unlock_irq(&spool->lock);  in hugepage_subpool_get_pages()
201 static long hugepage_subpool_put_pages(struct hugepage_subpool *spool,  in hugepage_subpool_put_pages()  argument
207 	if (!spool)  in hugepage_subpool_put_pages()
210 	spin_lock_irqsave(&spool->lock, flags);  in hugepage_subpool_put_pages()
212 	if (spool->max_hpages != -1)		/* maximum size accounting */  in hugepage_subpool_put_pages()
213 		spool->used_hpages -= delta;  in hugepage_subpool_put_pages()
216 	if (spool->min_hpages != -1 && spool->used_hpages < spool->min_hpages) {  in hugepage_subpool_put_pages()
217 		if (spool->rsv_hpages + delta <= spool->min_hpages)  in hugepage_subpool_put_pages()
220 			ret = spool->rsv_hpages + delta - spool->min_hpages;  in hugepage_subpool_put_pages()
222 		spool->rsv_hpages += delta;  in hugepage_subpool_put_pages()
223 		if (spool->rsv_hpages > spool->min_hpages)  in hugepage_subpool_put_pages()
224 			spool->rsv_hpages = spool->min_hpages;  in hugepage_subpool_put_pages()
231 	unlock_or_release_subpool(spool, flags);  in hugepage_subpool_put_pages()
238 	return HUGETLBFS_SB(inode->i_sb)->spool;  in subpool_inode()
748 	struct hugepage_subpool *spool = subpool_inode(inode);  in hugetlb_fix_reserve_counts()  local
752 	rsv_adjust = hugepage_subpool_get_pages(spool, 1);  in hugetlb_fix_reserve_counts()
1583 	struct hugepage_subpool *spool = hugetlb_page_subpool(page);  in free_huge_page()  local
1610 		if (hugepage_subpool_put_pages(spool, 1) == 0)  in free_huge_page()
2745 	struct hugepage_subpool *spool = subpool_vma(vma);  in alloc_huge_page()  local
2772 		gbl_chg = hugepage_subpool_get_pages(spool, 1);  in alloc_huge_page()
2835 	hugetlb_set_page_subpool(page, spool);  in alloc_huge_page()
2850 		rsv_adjust = hugepage_subpool_put_pages(spool, 1);  in alloc_huge_page()
2866 		hugepage_subpool_put_pages(spool, 1);  in alloc_huge_page()
4139 	struct hugepage_subpool *spool = subpool_vma(vma);  in hugetlb_vm_op_close()  local
4156 		gbl_reserve = hugepage_subpool_put_pages(spool, reserve);  in hugetlb_vm_op_close()
5697 	struct hugepage_subpool *spool = subpool_inode(inode);  in hugetlb_reserve_pages()  local
5763 	gbl_reserve = hugepage_subpool_get_pages(spool, chg);  in hugetlb_reserve_pages()
5809 			rsv_adjust = hugepage_subpool_put_pages(spool,  in hugetlb_reserve_pages()
5826 	(void)hugepage_subpool_put_pages(spool, chg);  in hugetlb_reserve_pages()
5848 	struct hugepage_subpool *spool = subpool_inode(inode);  in hugetlb_unreserve_pages()  local
5877 	gbl_reserve = hugepage_subpool_put_pages(spool, (chg - freed));  in hugetlb_unreserve_pages()